In Pennsylvania and the surrounding states where these premium gas stations dominate highway pit stops, everyone has an opinion as to which is the convenience chain of choice.

To definitively settle this schism, we took it upon ourselves to journey to the heartland of the two rivals — the borderlands of Pennsylvania and New Jersey — and see which chain reigns supreme.

Our quest begins in the parking lot of a Wawa in south Phillipsburg, New Jersey, off Route 22. The gas pumps are plentiful and bustling with activity, but we're more interested in what's inside.

Hollis Johnson

Wawa, with more than 720 locations in six states on the East Coast, is renowned for its high-quality yet inexpensive food. Walking inside, we find the vibe to be clean and professional, yet unassuming. Muted yellows and browns are the key colors, leading to a relaxed but often bland visual landscape.

Hollis Johnson

It takes a few minutes to even comprehend the array of food options available at Wawa. The well-stocked prepackaged section is ambitious and diverse in scope. Even packaged food appears fresh — not as though it has been abandoned on the shelf for untold lengths.

Hollis Johnson

The coffee station is equally bountiful, something crucial to a well-regarded highway pit stop.

Hollis Johnson

Wawa's breakfast-pastry selection receives points for variety, if not creativity. It's normal doughnut fare, but at six for $3, the price is right.

Hollis Johnson

The milkshake and Icee machines, a convenience store classic, are another weft in the rich woven tapestry of Wawa's culinary smorgasbord. Unfortunately, this location's machines are broken — as are our hopes for a refreshing chilled beverage.

Hollis Johnson

Our spirits are lifted as we approach Wawa's digital ordering kiosk, our gateway to the chain's legendary made-to-order sandwiches and more. It implores us to "Select a Variety" — and oh! What variety.

Hollis Johnson

The prices for everything are extremely reasonable, be it breakfast, lunch, or dinner.

Hollis Johnson

Its hoagies and other sandwiches are made fresh in front of our eyes. Of course, there are sacrifices to be had for freshly prepared fare, as the wait is a good five to seven minutes.

Hollis Johnson

We leave, arms laden with the spoils of the first leg of our quest. Between our intrepid trio, we shared the following: a small meatball hoagie, a tomato-and-cheese panini, a small tomato-and-basil bisque, a bacon avocado club sandwich, a "dirt" parfait, and two Wawa-branded teas.

Hollis Johnson

The $1.49 teas are surprisingly good. They are quite sweet and sugary, including the diet green tea. But as far as gas-station-branded beverages go, it doesn't get much better than this.

Hollis Johnson

The humble hoagie is one of the main attractions at Wawa, and it does not disappoint. Served warm and well-toasted, with melty mozzarella and spongy yet hardy bread, the meatball hoagie is on the same level of quality as your favorite local deli. After a long day on the road, such warm comfort — at a modest $4.59 — is welcome.

Hollis Johnson

Wawa's $5.29 cheese panini, however, transcends comfort to reach a surprising level of sophistication. This particular iteration is expertly grilled, and bedecked with tomato, baby spinach greens, and a creamy sun-dried tomato pesto sauce. It's the kind of sandwich that wouldn't be out of place at an upscale bistro or Panera Bread — but with a price that speaks to its gas-station roots.

Hollis Johnson

Continuing on the upscale bistro theme is the tomato basil bisque, another unlikely find at a gas-station convenience store. The quality isn't at quite the same level as the panini — the broth is a tad watery for a bisque, and the flavor is tasty but lacking complexity — but the effort is a worthy and admirable one.

Hollis Johnson

One misstep, however, is the avocado bacon club. The effort of the previous items is absent. Iceberg lettuce? Undertoasted bread? This isn't the quality cuisine we quickly have come to expect of Wawa.

Hollis Johnson

Fortunately, Wawa regains its footing with a childhood classic that our testers can't resist: the "dirt cup" parfait. Kate Taylor, our resident dirt correspondent, is immediately enamored. Each element is the platonic ideal of pudding: the mousse is airy, the Oreo crumbles retain their crunch, and the worm-to-dirt ratio is golden. While Wawa offers some more posh items, it's nice to see the chain dabble in the convenience-store staples.

Hollis Johnson

With our palates pleasantly surprised by Wawa's food, we arrive at the nearest Sheetz in Easton, Pennsylvania, skeptical that any convenience-store rival could top Wawa.

Suddenly we're seeing why this chain with more than 500 locations in six states is seen as a worthy adversary of Wawa. The store is expansive and has an indoor dining area, something Wawa didn't have.

Hollis Johnson

But much like its convenience contender, the basics are there. There are slushie and milkshake machines galore, including a rare sighting of a Crystal Pepsi slushie flavor.

Hollis Johnson

The prepackaged selection is similar in scope but lacks the same zest for gourmand options.

Hollis Johnson

But nobody can argue with the sheer power and grandiosity of the Soda Cave.

Hollis Johnson

This somewhat inexplicable, yet altogether impressive, chilled chamber of carbonation is packed with enough soda to fuel an army of middle schoolers fresh out of soccer practice. Coke and Pepsi products come together as comrades in the grand Soda Cave — it's enough to persuade any soda lover to wipe Wawa away.

Hollis Johnson

We snap out of our soda stupor to order at another automated food kiosk and sample Sheetz's wares. We're struck by the many order modifications available, including myriad sauce choices — among them the mysterious and alluring "Boom Boom Sauce."

When we saw the infamous Mac 'n' Cheetos on the menu for $3.49, we knew we had to order them. These are unsurprisingly identical to Burger King's buzzy limited-time offering; however, their mere presence positions Sheetz's menu among the fast-food chains in a way that Wawa avoids.

Hollis Johnson

Sadly, the burger falls short of even the lowliest chain's iteration. It is flavorless, gray, and ultimately a melancholy betrayal of the tradition of hamburgers. Even adding tangy red onions and dipping it in Boom Boom Sauce could not save this sandwich. Every bite, we question: Is it nobler in the mind to suffer this burger, or to take arms and toss it?

Hollis Johnson

The fries, part of the $5 burger combo, are forgettable. The Boom Boom Sauce, however, elevated all it touched — save the blighted burger.

Hollis Johnson

There is no reason for Sheetz to encourage, via the ordering kiosk, the addition of fries as a sandwich topping — and yet, they persevere. What is essentially a popcorn-chicken hoagie has no structure or reason to it. Seeing no purpose to housing the perfectly good chicken in a bun, we eat the chicken in a more orthodox manner: with our hands.

Hollis Johnson

Before us lies the final test: We must get the dirt on the dirt. And this $2.99 treat has dug itself a hole it can't escape. Our dirt-cup correspondent, Kate Taylor, is despondent over the damp and crunchless crumble, and the entire treat is overly sweet. Sugar for sugar's sake does not a dirt cup make — especially when the worm population is severely depleted.

Hollis Johnson

Upon entering Sheetz, we were stunned by the flash and the panache. But this stylish sound and fashionable fury signifies nothing. It's the food that counts. While Sheetz may have plentiful soda reserves, its made-to-order food can't measure up to the image it presents.

Hollis Johnson

Sheetz scores points for looks and selection, but Wawa's dalliance with more hearty and fine fare places it a cut above the competition's fast-food-influenced menu. If we're looking for a scenic soda trip, we'll stop by Sheetz, but the food at Wawa justifies a visit in and of itself.